ThumbnailCNC

ThumbnailCNC is a service that is installed on a computer running Windows 7 or newer operating system. After installation, all the CNC programs (G-code files) on your computer will be represented by a thumbnail (small picture) when browsing directories with Windows Explorer (Just as you see thumbnails of your pictures and videos stored on your computer).
The service also includes a view for the Windows File Explorer preview feature. This view shows both the actual CNC program (G-code) as text and an image representation of the program's tool paths. Different versions of Windows have the setting to display Preview in different locations. In Windows 10, click view tab in the File Explorer, then Preview panel.
Supported G-codes: Rapid traverse: G0, G00, FMAX, F9999; Linear movement: G1, G01, L; Circular movement: G2, G02, G3, G03, C, CC, DR+, DR; Drilling/Thread Cycle: G81, G74, G73, G83, G84, G82; Supported CNC controls; ThumbnailCNC works for most controls. It has been tested with G code files from Fanuc, Haas, Heidenhain and Siemens.